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Kos

$1,009+ Cheap flights from Dulles Intl (IAD) to Kos (KGS)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — KGS
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Dulles Intl to Kos

Cheapest flights from Dulles Intl to Kos
Explore the most affordable flight options available from Dulles Intl to Kos. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This Trip.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1211:20 pm
IAD
-
KGS
2 stops26h 45m
Multiple Airlines
Thu 3/1912:35 pm
KGS
-
IAD
2 stops38h 55m
Multiple Airlines
Deal found 1/25$1,009
This Gurufare deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:20 pm
IAD
-
KGS
1 stop30h 50m
SWISS
Tue 8/258:30 pm
KGS
-
IAD
1 stop27h 15m
SWISS
Deal found 1/24$1,121
This Orbitz deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:20 pm
IAD
-
KGS
1 stop13h 45m
Multiple Airlines
Tue 8/258:30 pm
KGS
-
IAD
2 stops29h 31m
Multiple Airlines
Deal found 1/24$1,137
This FlightHub deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/178:20 pm
IAD
-
KGS
1 stop16h 20m
Multiple Airlines
Sat 8/228:35 pm
KGS
-
IAD
2 stops48h 00m
Multiple Airlines
Deal found 1/24$1,278
This Booking.com deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:55 pm
IAD
-
KGS
2 stops42h 10m
Lufthansa
Sat 8/228:35 pm
KGS
-
IAD
2 stops48h 00m
Lufthansa
Deal found 1/24$1,386
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/175:15 pm
IAD
-
KGS
2 stops16h 00m
Multiple Airlines
Fri 6/2610:25 pm
KGS
-
IAD
1 stop24h 20m
Multiple Airlines
Deal found 1/26$1,395
This Cheapflightsfares deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1610:20 pm
IAD
-
KGS
1 stop13h 45m
Lufthansa
Wed 7/17:55 pm
KGS
-
IAD
2 stops24h 40m
Lufthansa
Deal found 1/26$1,406
This Justfly.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:25 pm
IAD
-
KGS
1 stop20h 25m
Multiple Airlines
Wed 7/18:40 pm
KGS
-
IAD
1 stop27h 05m
Multiple Airlines
Deal found 1/26$1,427
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:40 pm
IAD
-
KGS
2 stops19h 10m
Multiple Airlines
Sun 8/29:00 pm
KGS
-
IAD
1 stop25h 45m
Multiple Airlines
Deal found 1/26$1,435

Find flight deals from Dulles Intl to Kos

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Kos (KGS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,009
(Trip.com)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Kos flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Kos flights.
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From Washington, D.C. Dulles Intl to Kos
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Kos that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Kos that are best for you.

Fly from

Dulles Intl

Fly to

Kos

Route

Depart

Return

Price

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Thu 3/12

11:20 pm-8:05 am

2 stops26h 45m

Kos

Thu 3/19

12:35 pm-9:30 pm

2 stops38h 55m

$1,009

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 6/17

5:15 pm-4:15 pm

2 stops16h 00m

Kos

Fri 6/26

10:25 pm-3:45 pm

1 stop24h 20m

$1,395

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 6/16

10:20 pm-7:05 pm

1 stop13h 45m

Kos

Wed 7/1

7:55 pm-1:35 pm

2 stops24h 40m

$1,406

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Tue 6/16

5:25 pm-8:50 pm

1 stop20h 25m

Kos

Wed 7/1

8:40 pm-4:45 pm

1 stop27h 05m

$1,427

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 7/8

8:40 pm-10:50 pm

2 stops19h 10m

Kos

Sun 8/2

9:00 pm-3:45 pm

1 stop25h 45m

$1,435

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Wed 6/17

5:25 pm-6:35 pm

1 stop18h 10m

Kos

Fri 6/26

9:40 pm-2:35 pm

1 stop23h 55m

$1,506

Washington, D.C.Kos

IAD - KGS

IADKGS

Washington, D.C. Dulles Intl

Sun 3/22

11:15 am-4:10 pm

2 stops22h 55m

Kos

Thu 3/26

12:35 pm-9:00 am

2 stops26h 25m

$1,754

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Kos flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Kos flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Kos flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Kos flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Kos flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Kos

Have a flexible travel schedule? Discover the best time to fly to Kos from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Kos. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Kos from Washington, D.C. Dulles Intl?

    Kos (KGS), located 12.8 mi from the city center, is the airport you fly into when you book flights from Washington, D.C. Dulles Intl to Kos. 0 airlines have flights to Kos from Washington, D.C. Dulles Intl on a regular basis. Booking flights from Washington, D.C. Dulles Intl to Kos should not be difficult; the airport handles an average of 0 inbound flights from Washington, D.C. Dulles Intl per day.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Kos?

    Lufthansa can get you from Washington, D.C. Dulles Intl Airport to Kos in just under 13h 45m. Your travel time can differ by up to . The distance between Washington, D.C. Dulles Intl Airport and Kos is about 5336 mi.

  • Can I find deals for flights from Dulles Intl to Kos that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Kos flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Kos?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Kos.

  • Can I find deals for business class flights from Dulles Intl to Kos?

    Yes. Cheapflights offers flight deals from Dulles Intl to Kos by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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